Booting stops on black screen with some texts after upgrading from Ubuntu 16.04 to 18.04 [closed]

Your computer is overheating during the boot process and hardware problems can rarely be solved by software, but still:

  • if there is a BIOS setting to lower the CPU frequency, set it to the lowest setting possible
  • If that's impossible, put the laptop in a sealed plastic bag (ziploc) in the freezer for 20 minutes, try to boot it and execute the following commands as root or with sudo privileges:

    apt install lm-sensors
    sensors
    

that way all sensors in your PC will be activated and TurBo Boost can kick in.

    apt install pm-utils
    pm-powersave true

which will also put your computer in a low power state.

But the real advice is to take it apart, clean it out with a vacuum cleaner and alcohol (200° proof) and put it back together.